obd2 LQ1

[ericjon262]

does the obd2 LQ1 use the same 40x sensor under the balancer and cam sensor/reluctor as the 31/3400's?

[caffeine]

The 3100/3400s use a 24x secondary crank trigger.

[SappySE107]

Yup, sensor on front intake cam and the crank pulley.

[ericjon262]

so in theory, a LQ1 could be run off of a LA1 PCM?

[SappySE107]

I believe so. I have OBD2 LQ1 and have been thinking LA1 swap with the same computer to start with. Its a 92 GP with OBD2 conversion.

[ericjon262]

Thanks, does the cam sensor get it's pickup off of the cam, or the cam cog?

[robertisaar]

hmm...... i would expect 0 issues swapping between a LQ1 and gen3(or even the RWD3.4) in terms of cam/crank signals with one possible thing to investigate: cylinder sequencing. all of the OHV engines likely generate a cam pulse for the same cylinder, but i don't know if the LQ1 has the pole in the right spot for that to happen at the same time too, especially if cam timing were being played with.

[ericjon262]

hmm...... i would expect 0 issues swapping between a LQ1 and gen3(or even the RWD3.4) in terms of cam/crank signals with one possible thing to investigate: cylinder sequencing. all of the OHV engines likely generate a cam pulse for the same cylinder, but i don't know if the LQ1 has the pole in the right spot for that to happen at the same time too, especially if cam timing were being played with.

both engines have the same firing order, and I assume, that the cam reluctor is TDC cylinder 1.

[robertisaar]

actually..... i want to say it is cylinder 3 or 5, but it's been a long time since i investigated it. i suppose i could look at the 1FA stuff to be certain, that had the early 94-95 LQ1 calibrations(before they moved to 2E) and all of the 94-95 A-body 3100 MAF calibrations.